I mentioned in the Are We Froze thread that I'd noticed my rear discs were looking a bit odd so had them off today and fitted a set of Delphi discs and pads.. Having checked my order history with LR Direct, the discs I took off were Allmakes brand ones bought in April 2017. So they've been on there for 16 months and have covered around 30,000 miles. What i don't know is what pads I fitted when I put them in but they haven't fared well. All pads were worn down evenly and by the same amount, none were sticking in the carrier and the pins were sliding nicely. Nothing appeared to be wrong with anything except for the appearance of the discs.

The offside one had marks looking like it had been sitting for weeks with the pads in one place, score marks and felt rough to the touch. Both inner and outer faces of the disc were the same.

While the nearside one appeared scored everywhere and felt rough to touch yet the inside face was clean and looking as you would expect a fairly new disc to look.

I'm thinking either the Allmakes discs aren't good quality or aren't compatible with the pads I've used. In saying that I would have thought if the pads are too hard, they would wear the discs but they would still stay smooth? Anyone else come across anything similar?

I've had very similar marks on the front discs of the Disco - I did find the brakes to be shocking at first (read barely working). Replaced the rear discs and pads as the previous owner had changed the pads, but with the cheapest ones he could find after the previous ones had worn out completely down to metal, investigaing discovered ridges over the back of one disc so thought that was the problem.

Made it a bit better but not much, so decided to do the front pads with some decent ones (back were now Brembo discs and pads) so got hold of some Mintex pads only as those discs appeared reasonably ok besides the odd marks. Found a seized caliper in the process (fixed with cleanup and new seals), but performance still rubbish afterwards. Ended up changing the master cylinder which transformed the brakes no end (particularly once it had been run for an hour or so the pedal would occasionally just disappear to the floor without really doing a lot to actually give a feeling of stopping with the old one). I think the marks disappeared after that, I'll have a look in the light tomorrow.

I've no idea what discs were on there, I think they are the same calipers as the P38 though. The pads he had fitted were Juratek I think on the back, he did say he'd swapped the front ones previously though.

Just to be clear - the marks crossing the discs (edge of the pads in particular) were the most noticeable bits, though the light scoring was there as well. Its done about 1000 miles since and the marks are still there, though not as visible as they were before. Will get a photo in the light of them.

Disco 2 has the same discs, pads and, I assume, calipers as the P38. Brakes were fine, except for the shudder under braking from speed, and both calipers were free with pistons pushing back in nicely. Brakes do seem to have slightly more bite now than they did although that might just be me taking more note of how they feel.

Had similar effects and marks with cast iron disks on my Norton Commander. Supplier sent replacement disks saying they had had some material issues. And told me off for upgrading calipers from standard two piston XJ900 ones to 4 piston FJ1200 ones which should have had a slightly different material. Dammed if I can recall if they made me a special pair from the right material or not but 70,000 miles on were still working fine.

Clive

Have had a look in the light and can't get a decent photo without taking the wheel off, best i can do is this.

Bear in mind it hasn't moved in 2 weeks and the marks were more noticable before swapping the pads. This is also on the front, didn't notice the same on the rear.

Looking at the picture full size, yes, you can still see the marks. Not as pronounced as on mine but very similar. It almost looks like there's impurities in the metal.

Yes they were alot more noticeable (you could also feel them) before the pads were changed though.

Had a look though the paperwork that came with the car and the only receipt i can find for pads/discs was at 121k - Its now on 174 so doubt its the same pads i swapped out, though probably the same discs. no makes specified as it was a garage that did the work on that occasion so not really much help.